When it comes to Twitter Jonathan Bell, DUP candidate for Belfast South, is the most upbeat candidate in Northern Ireland.

According to a linguistic study of his tweets by online tool Analyze Words, Bell scored 93 out of 100 when it came to being positive on the social networking site.

Most upbeat candidates

93

Jonathan Bell (DUP)

89

Michelle Gildernew (Sinn Fein)

88

Alasdair McDonnell (SDLP)

88

Danny Kinahan (UUP)

87

Mark Durkan (SDLP)

Analyze Words

Upper Bann's SDLP candidate Dolores Kelly was the most worried parliamentary candidate in Northern Ireland, scoring 80 out of 100 for that measure.

People who are worried tend to use anxious language and ask nervous questions.

Five most worried candidates

80

Dolores Kelly (SDLP)

79

Clare Bailey (Greens)

76

Malachy Quinn (SDLP)

72

Steven Agnew (Greens)

70

Martyn Todd (Alliance)

The Green candidate for North Down, Steven Agnew, was the angriest Northern Irish candidate on the site while Neil Wilson, Conservative candidate for Belfast East, was the most depressed and Margaret Ritchie, the SDLP contender in South Down, was the most arrogant.

Angry tweets use aggressive language and talk directly at 'you' while depressed tweets contain lots of self-references and depressive words and arrogant tweets discuss actions, use lots of big words and don't reference the tweeter very much.

Angriest candidates

65

Steven Agnew (Green Party)

64

David Hawthorne (Alliance)

59

Dolores Kelly (SDLP)

58

Ross Hussey (UUP)

58

Henry Reilly (UKIP)

Analyze Words

All these scores are part of an ongoing study being carried out by researchers from the universities of Auckland and Texas.

Their website - Analyze Words - allows anyone to submit a Twitter handle which will then be instantly analysed and rated out of 100 based on a series of different moods.

Five most depressed candidates

72

Neil Wilson (Conservative)

67

Gavin Robinson (DUP)

63

Trevor Lunn (Alliance)

62

Ross Hussey (UUP)

62

Henry Reilly (UKIP)

Across the whole of the UK Liberal Democrat candidates (65/100) tended to be less upbeat than Labour candidates (67) and Conservatives (70).

Of the three main parties Labour candidates were the angriest while Lib Dems candidates were the most depressed on average and the Conservatives were the most arrogant.

Five most arrogant candidates

88

Margaret Ritchie (SDLP)

86

Ross Brown (Greens)

85

Gavin Robinson (DUP)

82

Trevor Lunn (Alliance)

82

Timothy Gaston (TUV)

The DUP were the most arrogant party fielding at least seven candidates with an average of 77 out of 100 while UKIP were actually one of the least arrogant with a score of 67.

A candidate must have a non-private Twitter account, have more than 400 followers and have tweeted regularly recently to be included in the study.